1893.] NATURAL SCIENCES OF PHILADELPHIA. 493 



5. — Ancistromma tenuicornis 8m. 

 Larrada tenuicornis Sm., I.e. p. 293. 9 

 Larra tenuicornis Patfc., 1. c. p. 389. 



9 . — Anterior margin of clypeus rounded-out, indistinctly den- 

 tate laterally ; front granulated; vertex finely and closely punctured; 

 space between eyes at top about equal to the length of antennal joints 

 2, 3 and one-third of 4 ; antenna? very long, setaceous, if anything, 

 longer than the head and thorax united, the first joint of flagellurn 

 about one-fifth, or less, shorter than the second; dorsulum with fine, 

 even and distinct punctures ; scutellura impressed; metathorax above 

 with a deep and broad furrow, transversely striated, the rnetapleura? 

 finely striated, the posterior face irregularly so; legs strongly spinose; 

 pygidial area with large and sparse punctures, scarcely twice as long 

 as it is broad at base. Deep black; shining; tarsi testaceous ; wings 

 dark fuscous, strongly iridescent ; marginal cell obtuse at apex; 

 head, thorax and abdomen entirely nude of pubescence or pile. 

 Length 13-15 mm. 



$ . — Anterior margiu of clypeus rounded-out, not dentate later- 

 ally ; front granlated, strongly punctured medially; vertex strongly 

 punctured ; space between the eyes at top as great as the length of 

 antennal joints 2-4 united ; antenna? as long as head and thorax 

 united, joints 1 and 2 of flagellurn about equal in length; scutellum 

 impressed ; rnetapleura? and posterior face of metathorax much more 

 coarsely sculptured than in the 9 ; legs tolerably spinose; abdomen 

 finely and distinctly punctured ; colored like the 9 ! f ac e> clypeus and 

 metathorax with rather sparse, silvery pubescence ; abdomen with 

 sparse silvery pile. Length 10-13 mm. 



California (Smith and 0. B. Johnson) ; State of Washington. 

 The deep black color and long antennae will at once distinguish this 

 species. 



6. — Ancistromma discreta u. sp. 



9 . — Anterior margin of elypeus rounded-out, indistinctly dentate 

 laterally; front with strong, distinct punctures, which become much 

 finer laterally ; vertex strongly punctured, but not so much as the 

 front; space between the eyes at top about equal to the length of an- 

 tennal joints 2. 3 and three-fourths of 4 combined ; antenna? very 

 long, setaceous, longer than head and thorax united, the first joint of 

 the flagellurn fully one-quarter shorter than the second ; dorsulum and 

 scutellum with tolerably strong and distinct punctures, scutellum not 



